Phytopathogenic Prokaryotes V1

Phytopathogenic Prokaryotes, Volume 1, provides an understanding of the diversity and complexity of diseases caused by phytopathogenic prokaryotes. It is part of a two-volume treatise that summarizes current research on these organisms. The book is organized into four parts. Part I covers the physical nature of prokaryotic phytopathogens as well as how they are presently classified, the limitation of this artificial classification, and the biology of the pathogen's invasion of plants. Part II presents conceptual hypotheses for the formation of the agricorpus (pathogen/host complex as a biological unit) and how this association may be detrimental or beneficial to both members of the unit. Other topics include the basic determinant of evolutionary change (the gene), and the evolution of vectors for dispersal of pathogens. Part III elaborates on the interaction at the plant/environment/pathogen interface (the plant surface). It presents information on the interaction of prokaryotes in the rhizosphere and phyllosphere, and how this interaction developed. Part IV shows how prokaryotes affect their hosts once infection has been established. This information is presented in sequence progressing from the disease-causing mechanisms of the facultative endophytic pathogens to those of the obligate endophytic pathogens.

ContributorsPrefaceContents of Volume 2Part I Phytopathogenic Prokaryotes Chapter 1 Phytopathogenic Prokaryotes: An Overview I. Introduction II. Diseases Caused by Phytopathogenic Prokaryotes III. Characteristics of Phytopathogenic Prokaryotes IV. Research Areas V. Summary References Chapter 2 How Phytopathogenic Prokaryotes Are Classified I. Introduction II. Systematic Classification III. The Position of "Pathogenicity" in Classification IV. The List of Approved Names V. DNA-DNA Homology VI. Protein Homology VII. Nutritional Homology VIII. Summary References Chapter 3 The Infection Process I. Introduction II. Migration to the Host III. Recognition and Contact IV. Predisposing Environmental Factors V. Natural Openings VI. Wounds VII. Establishment ReferencesPart II Concepts for Plant Interactions with Prokaryotes Chapter 4 Rationale for Pathogenesis I. Introduction II. Rationale for Occurrence of Pathogens III. Rationale for Coevolution IV. Rationale for Genetic Accommodations V. Economic Rationale VI. Conclusion References Chapter 5 The Evolution of Pathogenesis and Race Specificity I. Introduction II. Basic Terminology III. Genetic Organization and Evolutionary Mechanisms IV. Factors Affecting Race Specificity and Pathogenesis V. New Genetic Mechanisms for Variation VI. Prospectus References Chapter 6 Evolution of the Insect Vector Relationship I. Introduction II. Vector Transmission as an Adaptation of Parasitism III. Vector-Pathogen Interactions IV. Parasitic Fitness and Selection V. Conclusions ReferencesPart III Prokaryote Interactions on Plant Surfaces Chapter 7 Plant Surfaces and Bacterial Growth: The Rhizosphere and Rhizoplane I. Introduction II. The Physical Environment at Plant Surfaces III. The Chemical Environment at Plant Surfaces IV. Future Work References Chapter 8 Role of Root-Colonizing Bacteria in Plant Growth I. Introduction II. Plant Growth-Promoting Rhizobacteria III. Root-Colonizing Bacteria in Plant Health and Disease: Potpourri IV. Influence of Soil Physical Factors V. Future Directions-The Need for Techniques References Chapter 9 Nitrogen-Fixing Bacteria: Colonization of the Rhizosphere and Roots I. Introduction II. The Rhizosphere III. Specificity of Infection or Association IV. Competition of Rhizobium Strains for Nodulation V. Concluding Remarks References Chapter 10 Soft-Rotting Bacteria in the Rhizosphere I. Introduction II. Identification of Subspecies and Strains of Erwinia carotovora III. Occurrence of Erwinia carotovora in Fallow Soils IV. Occurrence of Erwinia carotovora in Plant Rhizospheres V. Significance of Soil and Rhizosphere Populations of Erwinia carotovora VI. Factors Affecting the Isolation of Erwinia carotovora from Fallow and Rhizosphere Soils VII. Factors Affecting Populations of Erwinia carotovora in Rhizosphere Soils VIII. Conclusion References Chapter 11 Clostridia and Plant Disease: New Pathogens? I. Introduction II. Clostridia in Relation to Bacterial Soft Rot of Potato Tubers III. Clostridia in Relation to Cavity Spot of Carrots IV. Clostridia in Relation to Internal Wetwood in Trees V. Requirements for Future Work on Clostridia Associated with Plants VI. Conclusions References Chapter 12 Survival of Phytopathogenic Bacteria in Soil I.